Continuous freezer



J. F. PFEIFFEH.

CONTINUOUS FREEZER.

APPLICATION FILED IuNE 2, 1920.

15,396,972@ I Patented; Nov. 15, 1921.

2 SHEETS-SHEET I.

1. F. PFEIFFER.

CONTINUOUS FREEZER.

APPLICATION FILED JUNE 2, 1920.

LSQT/, Patentd Nov. I5, IIOZL 2 SHEETS-SHEET 2.

INEM WWMWINJ@ l lo ' nel'.

IHN F. PFEIFJFEE, @EF SEATTLE, WASHINGTON.

CONTINUUUS FREEZER.

nascere.

Application :tiled June 2,

To all whom it may concern.' l

Be it known that I, JOHN F. FFEIFFER, a citizen of the United States of America, and resident of the city of Seattle, in the county of King and State of Washington, have invented certain new and useful Improvements in Continuous Freezers, of which the following is a specification.

My invention relates to a freezer designed for freezing liquids so as to form thin flakes and to do this in a manner which is continuous, whereby the unfrozen liquid may be fed to a moving apparatus upon which it may be frozen and then removed in thin Hakes.

rlFhe object of my invention is further to produce a device of this character of an improved and simple construction and one which will insure the formation of Hakes of comparatively small size, rather than large scales.

The features of my invention which I deem to be new will be lirst described and then particularly dened by the claims.

In the accompanying drawings I have shown my invention embodied'in the forms of construction which I prefer to use.

Figure 1 shows an elevation of my device, the freezing chamber and its contained parts being shown in section.

Fig. 2 is aA horizontal section through the freezing chamber taken above the belt which forms the freezing surface.

Fig. 3 is a side elevation of my device with one end of the freezing chamber shown in section. Y

In my invention I employ as the freezing surface an endless belt 1, which is mounted upon two pulleys 10 and 11 located at opposite endsof the freezing chamber. These pulleys may-be turned in any suitable man- The means illustrated consists in extending the shaft of one of the pulleys throu h'the side wall of the casing 3 and provi in it withra pulley, as 12, by which it may be riven.

rllhe freezing chamber consists of a box .or casing 2, which is, of course, made of such a construction as to maintain a low ,temperature within the casing without ex- .lnopper or bin 4, which receives the material Specification of Letters Patent.

Patented Nov. 15, 11921.

wao. serial no. escale.

after freezing. 'Ihe arrangement of these pipes may be varied as desired or found necessary. I prefer that certain of these pipes be placed so as to extend between the upper and lower runs o-f the belt 1 and they may also be placed under and above the outside of these runs. 'Ihe placing of these pipes is to a considerable degree optional.

A tank 5, outside of the casing2, holds the material to be frozen. 'Ihis tank is placed at such a position that the liquid will flow by gravity to the belt which serves as the freezing surface. rIhe position of this tank may, however, be lowered if air pressure is applied thereto for elevating the liquid, or this may be secured by the use of a pump. These are, however, expedients which would be obvious to any mechanic.

From the tank 5 extends a pipe or spout 50, into the casing 2, withits discharge end over one of the pulleys carrying the belt l. I do not, however, discharge the liquid upon the freezing belt as a broad riband, but instead, divide thel discharge opening at the end of the spout 50 into a series of openings, as are shown at 51 in Fig. 1. rllhis secures the deposit upon the freezing surface of a series of narrow strips, or ribands, which are each distinct and separated from the others.' As the belt 1 progresses about its pulleys, these strips of liquid are congealed and when they reach the end of the lower run are scraped 0E, as by a scraper 6 which `engages with the under surface of the belt.

These, when scraped o", drop into the hopper 4c and may be retained therein or conducted to another container, as desired.

I prefer to construct the tank 5 with a double or false bottom, as 52, which bottom is provided with a series of perforations 53, through which air may be discharged into the contents of the tank. This .air may be provided through a pipe 70 leading from a tank 7, or any other source ofl air under ressure. This air passing up through the liquid will serve to keep it thoroughly mixed until it has been discharged and frozen'.

At one side of the casing `2 which forms the freezing chamber I provide a door, as 20, upon which is mounted the shafts which carry the wheels 10 and 11, over which the belt passes. In consequence this entire apparatus may be readily removed from the casing by opening the door, thus facilitating its thorough and easy cleaning. The

Q naeaeva refrigerating pipe 3 which entends between the runs of the belt will not interfere with its swinging in and out.

By depositing the liquid upon the reezing surface in a series of narrow strips, these when removed by the scraper, are broken up into quite small Hakes, thus producing a product which is more acceptable than if it should come off in large scales, as would often occur when the liquid is applied as a broad film. The product is therefore more attractive than it would be if the material was frozen as a broad sheet. l have found that material made in this way presents a very attractive appearance and also holds up without melting better than the same material frozen in the usual manner. i

"What l claim as my invention is:

1. A continuous freezing apparatus for liquids comprising a casing, a section at one side of the casing being hinged to swing outward, an endless belt supported 'from said swinging section, refrigerating pipes within the casing and adapted to extend between and outside of the runs of the belt, a tank, a delivery spout extending from the tank to discharge upon the belt, and a scraper at the under side of the belt.

2. A continuous freezing apparatus for liquids comprising a casing, a section at one side of the casing being hinged to swing out# ward, an endless belt supported from said swinging section, refrigerating pipes within the casing and adapted to extend between and outsideof the runs of the belt, a tank, a delivery spoutextending from the tank to discharge upon the belt, said spout having a plurality of discharge openings depositing ike series of ribands of liquid upon the Signed at Seattle, King county, Washington, this 28th day out May, i920'.

JOHN F. PFEllllElt. 

